cubase 5 crash after copy

No.

Altho’ that can be done, that’s not what we want in this case.

Think of that ‘funky’ Cubase project of yours as a loaded (but not working) gun.
The bullets in that gun are your audio and MIDI files.

We are going to take the bullets from the ‘not working’ gun
(your current project) and put them into a ‘working’ gun
(a new project).

Let’s now do that:

1-Make sure the new project has the same
'Project Settings/tempo/audio resolution/pan law etc as the first.

2-Export each ‘Instrument’ Track’ or MIDI track to its own <.mid> file.
3-Export each audio track to its own <.aif> or <.wav> file. (more on that below)
4-Open up a ‘new’ project and use Cubase’s ‘Import’ feature
to bring each file into that new project on its own track.
(load the new gun)

This way your performance work is not lost but you will have to
‘re-tweak’ EQ’s/ FX’s/plugs etc.

That’s why taking the many screenshots can help you remember those settings.

Re: audio files. A tip.

Before exporting your audio files:

On each audio track In the Arrange/Project Window,
make sure you ‘extend’ all audio files parts back to the start of the song.

Of course there will be only silence till the first audio event starts
but we use this technique as a kind of a ‘marker’,
This way when Cubase imports your audio tracks (starting at the beginning)
the audio events in it will ‘playback’ in their proper place in the time line.

You can of course find info on importing and exporting stuff in the manual.
And there might even be some Utube vids on this.

S,
If this work is really important to you, (original creation/clients/$$/etc)
and nothing else works,
tho’ time comsuming, this will work and very little
(other than time) will be lost.

HTH (hope this helps)
{‘-’}